55239605 has 4 divisors (see below), whose sum is σ = 66287532. Its totient is φ = 44191680.

The previous prime is 55239529. The next prime is 55239607. The reversal of 55239605 is 50693255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50693255 = 5 ⋅10138651.

It can be written as a sum of positive squares in 2 ways, for example, as 37185604 + 18054001 = 6098^2 + 4249^2 .

It is not a de Polignac number, because 55239605 - 2²² = 51045301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55239607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5523956 + ... + 5523965.

It is an arithmetic number, because the mean of its divisors is an integer number (16571883).

Almost surely, 2^55239605 is an apocalyptic number.

It is an amenable number.

55239605 is a deficient number, since it is larger than the sum of its proper divisors (11047927).

55239605 is a wasteful number, since it uses less digits than its factorization.

55239605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047926.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 55239605 is about 7432.3350973970. The cubic root of 55239605 is about 380.8466923839.

The spelling of 55239605 in words is "fifty-five million, two hundred thirty-nine thousand, six hundred five".